/* ==========================================================
   KADA — 대한치과경영학회
   Desktop stylesheet
   ========================================================== */

:root {
  --paper: #FAF7F1;
  --paper-2: #F1EDE4;
  --ink: #10201C;
  --ink-soft: #3C4B47;
  --deep: #0E3B33;
  --deep-2: #0A2C26;
  --mint: #9FE8D2;
  --coral: #FF6A3D;
  --line: rgba(16, 32, 28, 0.14);
  --line-light: rgba(250, 247, 241, 0.18);
  --serif: "Noto Serif KR", "Apple SD Gothic Neo", serif;
  --sans: "Pretendard Variable", Pretendard, "Apple SD Gothic Neo", -apple-system, sans-serif;
  --max: 1240px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 40px; }

::selection { background: var(--mint); color: var(--deep-2); }

/* ---------- reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1), transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: 0.1s; }
.reveal.d2 { transition-delay: 0.2s; }
.reveal.d3 { transition-delay: 0.3s; }

/* ---------- header ---------- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background 0.35s ease, box-shadow 0.35s ease;
}
.header .wrap {
  max-width: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  padding: 0 40px;
}
.header.scrolled {
  background: rgba(250, 247, 241, 0.92);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--line);
}

.logo { display: flex; align-items: center; gap: 12px; }
.logo-mark {
  width: 40px; height: 40px;
  border-radius: 12px;
  background: var(--deep);
  color: var(--mint);
  display: grid; place-items: center;
  font-family: var(--serif);
  font-weight: 900;
  font-size: 15px;
  letter-spacing: -0.5px;
  flex-shrink: 0;
}
.logo-mark.logo-image {
  display: block;
  background: transparent !important;
  object-fit: contain;
}
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-text strong { font-size: 16px; font-weight: 800; letter-spacing: -0.3px; }
.logo-text span { font-size: 10.5px; letter-spacing: 1.6px; text-transform: uppercase; color: var(--ink-soft); }

/* header on dark hero */
.header:not(.scrolled) { color: var(--paper); }
.header:not(.scrolled) .logo-mark { background: var(--mint); color: var(--deep-2); }
.header:not(.scrolled) .logo-text span { color: rgba(250,247,241,0.6); }
.header.scrolled { color: var(--ink); }
.header.scrolled .logo-mark { background: var(--deep); color: var(--mint); }
.header.scrolled .logo-text span { color: var(--ink-soft); }

.nav { display: flex; gap: 34px; align-items: center; }
.nav a {
  font-size: 15px;
  font-weight: 600;
  opacity: 0.85;
  position: relative;
  padding: 6px 0;
  transition: opacity 0.2s;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--coral);
  transition: width 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}
.nav a:hover { opacity: 1; }
.nav a:hover::after { width: 100%; }

.header-right { display: flex; align-items: center; gap: 18px; }
.lang-switch {
  display: flex;
  border: 1px solid currentColor;
  border-radius: 999px;
  overflow: hidden;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.lang-switch a { padding: 6px 14px; opacity: 0.6; transition: 0.2s; }
.lang-switch a.on { opacity: 1; background: var(--coral); color: #fff; }
.lang-switch a:not(.on):hover { opacity: 1; }

.btn-join {
  background: var(--coral);
  color: #fff !important;
  padding: 10px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn-join:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(255, 106, 61, 0.35); }

/* ---------- hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  background: var(--deep-2);
  color: var(--paper);
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 85% 20%, rgba(159, 232, 210, 0.14), transparent 60%),
    radial-gradient(ellipse 50% 60% at 10% 90%, rgba(255, 106, 61, 0.10), transparent 55%);
}
.hero-grid-lines {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-light) 1px, transparent 1px);
  background-size: 120px 120px;
  opacity: 0.25;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 75%);
}
.hero-year {
  position: absolute;
  right: -40px;
  bottom: -60px;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(240px, 30vw, 460px);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(159, 232, 210, 0.22);
  user-select: none;
  pointer-events: none;
  letter-spacing: -0.04em;
}
.hero-vertical {
  position: absolute;
  left: 13px;
  bottom: 48px;
  writing-mode: vertical-rl;
  font-size: 11px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: rgba(250, 247, 241, 0.45);
}
.hero .wrap { position: relative; z-index: 2; width: 100%; padding-top: 120px; padding-bottom: 100px; }

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--mint);
  margin-bottom: 28px;
}
.hero-eyebrow::before {
  content: "";
  width: 40px; height: 1px;
  background: var(--mint);
}
.hero h1 {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(48px, 6.2vw, 88px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  max-width: 15em;
}
.hero h1 em {
  font-style: normal;
  color: var(--mint);
  position: relative;
}
.hero-sub {
  margin-top: 30px;
  font-size: 19px;
  font-weight: 400;
  color: rgba(250, 247, 241, 0.78);
  max-width: 560px;
  line-height: 1.8;
}
.hero-ctas { margin-top: 44px; display: flex; gap: 16px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 700;
  transition: transform 0.25s, box-shadow 0.25s, background 0.25s;
}
.btn-primary { background: var(--coral); color: #fff; }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(255, 106, 61, 0.4); }
.btn-ghost { border: 1.5px solid rgba(250, 247, 241, 0.4); color: var(--paper); }
.btn-ghost:hover { border-color: var(--mint); color: var(--mint); transform: translateY(-3px); }
.btn .arr { transition: transform 0.25s; }
.btn:hover .arr { transform: translateX(4px); }

.hero-scroll {
  position: absolute;
  bottom: 40px; left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: rgba(250, 247, 241, 0.5);
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  z-index: 2;
}
.hero-scroll::after {
  content: "";
  width: 1px; height: 44px;
  background: linear-gradient(rgba(250,247,241,0.6), transparent);
  animation: drop 2s ease-in-out infinite;
}
@keyframes drop {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- marquee ---------- */
.marquee {
  background: var(--mint);
  color: var(--deep-2);
  overflow: hidden;
  padding: 18px 0;
  border-top: 1px solid var(--deep-2);
  border-bottom: 1px solid var(--deep-2);
}
.marquee-track {
  display: flex;
  gap: 0;
  width: max-content;
  animation: scroll-x 30s linear infinite;
}
.marquee span {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 17px;
  white-space: nowrap;
  padding: 0 28px;
  display: flex; align-items: center; gap: 56px;
}
.marquee span::after { content: "✚"; font-size: 13px; color: var(--coral); }
@keyframes scroll-x {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}


/* ---------- section scaffolding ---------- */
.section { padding: 110px 0; }
.section-head { display: flex; align-items: baseline; gap: 24px; margin-bottom: 64px; }
.section-num {
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--coral);
  letter-spacing: 1px;
}
.section-title {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(34px, 4vw, 52px);
  letter-spacing: -0.02em;
  line-height: 1.25;
}
.section-title .en {
  display: block;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-top: 12px;
}

/* ---------- about ---------- */
.about-lead {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 80px;
  align-items: start;
}
.about-lead .big {
  font-family: var(--serif);
  font-size: clamp(24px, 2.4vw, 32px);
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: -0.01em;
}
.about-lead .big mark {
  background: linear-gradient(transparent 62%, var(--mint) 62%);
  color: inherit;
}
.about-lead .body { color: var(--ink-soft); font-size: 17px; line-height: 1.9; }
.about-lead .body p + p { margin-top: 20px; }

.pillars {
  margin-top: 80px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.pillar {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 40px 34px;
  position: relative;
  overflow: hidden;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.35s;
}
.pillar:hover { transform: translateY(-8px); box-shadow: 0 24px 48px rgba(16, 32, 28, 0.10); }
.pillar .icon {
  width: 52px; height: 52px;
  border-radius: 16px;
  display: grid; place-items: center;
  font-size: 24px;
  margin-bottom: 26px;
  background: var(--paper-2);
}
.pillar h3 { font-size: 20px; font-weight: 800; margin-bottom: 12px; letter-spacing: -0.02em; }
.pillar p { font-size: 15px; color: var(--ink-soft); line-height: 1.8; }
.pillar .tag {
  position: absolute;
  top: 34px; right: 30px;
  font-family: var(--serif);
  font-size: 42px;
  font-weight: 900;
  color: transparent;
  -webkit-text-stroke: 1px var(--line);
  line-height: 1;
}

/* ---------- activities (dark) ---------- */
.section-dark {
  background: var(--deep-2);
  color: var(--paper);
  border-radius: 48px;
  margin: 0 24px;
  position: relative;
  overflow: hidden;
}
.section-dark::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 50% 40% at 90% 10%, rgba(159, 232, 210, 0.12), transparent 60%);
  pointer-events: none;
}
.section-dark .section-title .en { color: rgba(250, 247, 241, 0.55); }
.acts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.act {
  border: 1px solid var(--line-light);
  border-radius: 24px;
  padding: 42px 40px;
  display: flex;
  gap: 30px;
  align-items: flex-start;
  transition: background 0.3s, border-color 0.3s;
  position: relative;
}
.act:hover { background: rgba(159, 232, 210, 0.07); border-color: rgba(159, 232, 210, 0.4); }
.act .no {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  color: var(--coral);
  flex-shrink: 0;
  margin-top: 4px;
}
.act h3 { font-size: 22px; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 4px; }
.act h3 small {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--mint);
  margin-bottom: 8px;
}
.act p { font-size: 15px; color: rgba(250, 247, 241, 0.72); line-height: 1.8; margin-top: 10px; }

/* conference history timeline (activities) */
.act-toggle { cursor: pointer; }
.act-more {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 16px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--coral);
}
.act-more .arr { transition: transform 0.35s; font-size: 11px; }
.act-toggle.open .act-more .arr { transform: rotate(180deg); }
.acc-panel {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  margin-top: 0;
  transition: max-height 0.7s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.5s, margin-top 0.5s;
}
.acc-panel.open { max-height: 2600px; opacity: 1; margin-top: 24px; }
.acts + .acts, .acc-panel + .acts { margin-top: 20px; }
.acc-inner {
  border: 1px solid var(--line-light);
  border-radius: 24px;
  padding: 36px 40px;
  background: rgba(159, 232, 210, 0.04);
}
.conf-tl-head {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--mint);
  margin-bottom: 8px;
}
.conf-item {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 36px;
  padding: 30px 0;
  border-top: 1px solid var(--line-light);
}
.conf-item:first-of-type { border-top: none; }
.conf-year {
  font-family: var(--serif);
  font-size: 44px;
  font-weight: 900;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.2px var(--mint);
  letter-spacing: -0.02em;
}
.conf-body h4 {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}
.conf-meta {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--mint);
  margin-bottom: 14px;
}
.conf-talks { display: flex; flex-direction: column; gap: 7px; }
.conf-talks li {
  position: relative;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(250, 247, 241, 0.72);
  padding-left: 16px;
  list-style: none;
}
.conf-talks li::before {
  content: "";
  position: absolute;
  left: 0; top: 10px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--coral);
}

/* ---------- 학회활동 갤러리 (주요활동 섹션 하단) ---------- */
.gallery-block { margin-top: 56px; }
.gallery-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}
.gallery-more {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--mint);
  transition: 0.2s;
}
.gallery-more:hover { color: var(--coral); }
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.g-card {
  display: block;
  border: 1px solid var(--line-light);
  border-radius: 18px;
  overflow: hidden;
  background: rgba(250, 247, 241, 0.05);
  transition: transform 0.3s, border-color 0.3s;
}
.g-card:hover { transform: translateY(-5px); border-color: rgba(159, 232, 210, 0.5); }
.g-card .g-img {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: rgba(250, 247, 241, 0.06);
}
.g-card .g-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s;
}
.g-card:hover .g-img img { transform: scale(1.05); }
.g-card .g-cap {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  padding: 12px 15px 14px;
  font-size: 13px;
  line-height: 1.55;
  color: rgba(250, 247, 241, 0.8);
}
@media (max-width: 1024px) {
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- 덴탈아리랑 기고 배너 (주요활동, 갤러리 하단) ---------- */
.press-banner {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-top: 40px;
  padding: 28px 34px;
  border: 1px solid var(--line-light);
  border-radius: 24px;
  background: linear-gradient(120deg, rgba(159, 232, 210, 0.08), rgba(255, 106, 61, 0.06));
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.press-banner:hover { transform: translateY(-4px); border-color: rgba(159, 232, 210, 0.5); box-shadow: 0 20px 44px rgba(0, 0, 0, 0.25); }
.press-banner .pb-strip { display: flex; flex-shrink: 0; }
.press-banner .pb-strip img {
  width: 62px; height: 82px; object-fit: cover; object-position: top;
  border-radius: 8px; border: 2px solid var(--deep-2);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
  margin-left: -22px;
  transition: transform 0.3s;
}
.press-banner .pb-strip img:first-child { margin-left: 0; }
.press-banner:hover .pb-strip img:nth-child(1) { transform: rotate(-6deg) translateY(-2px); }
.press-banner:hover .pb-strip img:nth-child(3) { transform: rotate(6deg) translateY(-2px); }
.press-banner .pb-body { flex: 1; min-width: 0; }
.press-banner .pb-eyebrow {
  font-size: 12px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase;
  color: var(--mint); margin-bottom: 8px;
}
.press-banner .pb-title { font-family: var(--serif); font-size: clamp(21px, 2.4vw, 28px); font-weight: 900; letter-spacing: -0.02em; color: var(--paper); }
.press-banner .pb-desc { margin-top: 8px; font-size: 14.5px; color: rgba(250, 247, 241, 0.7); line-height: 1.7; }
.press-banner .pb-arrow {
  flex-shrink: 0; width: 54px; height: 54px; border-radius: 50%;
  display: grid; place-items: center; font-size: 20px;
  background: var(--coral); color: #fff; transition: transform 0.3s;
}
.press-banner:hover .pb-arrow { transform: translateX(5px); }
@media (max-width: 720px) {
  .press-banner { flex-wrap: wrap; gap: 18px; padding: 22px; }
  .press-banner .pb-arrow { width: 46px; height: 46px; }
}

/* ---------- board (분기별 집담회 게시판) ---------- */
.board { margin-top: 18px; }
.board-item {
  border-top: 1px solid var(--line-light);
  cursor: pointer;
}
.board-item:first-child { border-top: none; }
.board-item .bi-head {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  align-items: center;
  padding: 18px 4px;
}
.board-item .bi-title { font-size: 15.5px; font-weight: 600; color: var(--paper); }
.board-item .bi-date {
  font-size: 12.5px;
  color: rgba(250, 247, 241, 0.5);
  font-variant-numeric: tabular-nums;
}
.board-item .bi-body {
  display: none;
  padding: 0 4px 20px;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(250, 247, 241, 0.75);
  white-space: pre-line;
}
.board-item.open .bi-body { display: block; }
.board-item.open .bi-title { color: var(--mint); }
.board-empty {
  padding: 26px 4px;
  font-size: 14px;
  color: rgba(250, 247, 241, 0.55);
}
/* 자세히 보기 안내 */
.bi-more {
  display: inline-flex;
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--coral);
}
.bi-more .wo { display: none; }
.board-item.open .bi-more .wc { display: none; }
.board-item.open .bi-more .wo { display: inline; }
.board-item .bi-body { padding-top: 2px; }

/* 사진 첨부 게시글: 좌측 1/3 이미지 + 우측 2/3 내용 */
.board-item.has-img {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 28px;
  align-items: center;
  padding: 20px 4px;
}
.board-item.has-img .bi-head { padding: 0 0 10px; }
.board-item.has-img .bi-title {
  font-family: var(--serif);
  font-size: clamp(24px, 2.4vw, 32px);
  font-weight: 900;
  line-height: 1.35;
  letter-spacing: -0.02em;
}
.board-item.has-img .bi-body { padding: 0; }
.bi-img {
  aspect-ratio: 4 / 3;
  border-radius: 14px;
  overflow: hidden;
  background: rgba(250, 247, 241, 0.06);
  cursor: zoom-in;
}
.bi-img img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  transition: transform 0.3s;
}
.bi-img:hover img { transform: scale(1.03); }
.board-pager {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 22px;
}
.board-pager button {
  min-width: 34px; height: 34px;
  border-radius: 10px;
  border: 1px solid var(--line-light);
  background: none;
  color: rgba(250, 247, 241, 0.7);
  font-size: 13px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: 0.2s;
}
.board-pager button:hover { border-color: var(--mint); color: var(--mint); }
.board-pager button.on { background: var(--mint); color: var(--deep-2); border-color: var(--mint); }
.board-pager button:disabled { opacity: 0.35; cursor: default; }

/* ---------- history ---------- */
.timeline { position: relative; padding-left: 40px; max-width: 820px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 7px; top: 8px; bottom: 8px;
  width: 1px;
  background: var(--line);
}
.tl-item { position: relative; padding-bottom: 56px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: "";
  position: absolute;
  left: -38px; top: 9px;
  width: 15px; height: 15px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--coral);
}
.tl-item .year {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 30px;
  letter-spacing: -0.02em;
  color: var(--deep);
}
.tl-item h3 { font-size: 19px; font-weight: 800; margin: 8px 0 6px; }
.tl-item p { color: var(--ink-soft); font-size: 15.5px; max-width: 600px; }

/* ---------- leadership ---------- */
.lead-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.person {
  position: relative;
  perspective: 1200px;
  cursor: pointer;
  min-height: 340px;
}
.person .flip-inner {
  position: relative;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}
.person.flipped .flip-inner { transform: rotateY(180deg); }
.person .flip-front,
.person .flip-back {
  position: absolute;
  inset: 0;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border-radius: 24px;
  padding: 34px 28px;
  display: flex;
  flex-direction: column;
}
.person .flip-front {
  background: #fff;
  border: 1px solid var(--line);
  transition: box-shadow 0.3s;
}
.person:hover .flip-front { box-shadow: 0 20px 40px rgba(16, 32, 28, 0.10); }
.person.chair .flip-front { background: var(--deep); color: var(--paper); border-color: var(--deep); }
.person .flip-back {
  transform: rotateY(180deg);
  background: #43494B;
  color: #EDEAE3;
  overflow-y: auto;
}
.person .role {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--coral);
  margin-bottom: 14px;
}
.person.chair .role { color: var(--mint); }
.person .name {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 900;
  letter-spacing: -0.02em;
}
.person .desc { margin-top: 10px; font-size: 14px; color: var(--ink-soft); line-height: 1.7; }
.person.chair .desc { color: rgba(250, 247, 241, 0.7); }
.person .flip-hint {
  margin-top: auto;
  padding-top: 16px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--coral);
}
.person.chair .flip-hint { color: var(--mint); }
.person .back-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--mint);
  margin-bottom: 14px;
  flex-shrink: 0;
}
.person .bio { list-style: none; }
.person .bio li {
  position: relative;
  font-size: 13px;
  line-height: 1.55;
  padding: 4px 0 4px 14px;
}
.person .bio li::before {
  content: "";
  position: absolute;
  left: 0; top: 13px;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--coral);
}
.lead-note { margin-top: 28px; font-size: 14.5px; color: var(--ink-soft); }

/* leadership subsections (고문 / 이사진) */
.lead-sub { margin-top: 64px; }
.lead-subhead {
  display: flex;
  align-items: baseline;
  gap: 16px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--deep);
  margin-bottom: 26px;
}
.lead-subhead::before {
  content: "";
  align-self: center;
  width: 28px; height: 2px;
  background: var(--coral);
  flex-shrink: 0;
}
.lead-subhead .en {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.advisor-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.advisor {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 28px 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: transform 0.3s, box-shadow 0.3s;
}
.advisor:hover { transform: translateY(-4px); box-shadow: 0 16px 32px rgba(16, 32, 28, 0.08); }
.advisor .name { font-family: var(--serif); font-size: 24px; font-weight: 900; letter-spacing: -0.02em; }
.advisor .role {
  font-size: 12px; font-weight: 700; letter-spacing: 1px;
  text-transform: uppercase; color: var(--coral); flex-shrink: 0;
}
.director-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.director {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px 22px;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.director:hover { transform: translateY(-3px); box-shadow: 0 12px 26px rgba(16, 32, 28, 0.07); border-color: var(--mint); }
.director .name { font-family: var(--serif); font-size: 20px; font-weight: 800; letter-spacing: -0.02em; }
.director .role { margin-top: 5px; font-size: 12.5px; color: var(--coral); font-weight: 600; }
.director .role.plain { color: var(--ink-soft); }

/* ---------- journal ---------- */
.journal {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 80px;
  align-items: center;
}
.journal-cover {
  aspect-ratio: 3 / 4;
  border-radius: 20px;
  background: linear-gradient(160deg, var(--deep) 0%, var(--deep-2) 100%);
  color: var(--paper);
  padding: 40px 34px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
  box-shadow: 24px 32px 60px rgba(16, 32, 28, 0.22);
  transform: rotate(-2deg);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}
.journal-cover:hover { transform: rotate(0deg) scale(1.02); }
.journal-cover::after {
  content: "✚";
  position: absolute;
  right: -30px; bottom: -46px;
  font-size: 220px;
  color: rgba(159, 232, 210, 0.12);
  line-height: 1;
}
.journal-cover .kci {
  align-self: flex-start;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--mint);
  color: var(--mint);
}
.journal-cover .j-title {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 30px;
  line-height: 1.35;
  letter-spacing: -0.01em;
}
.journal-cover .j-title small {
  display: block;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 1.5px;
  color: rgba(250, 247, 241, 0.6);
  margin-top: 14px;
  text-transform: uppercase;
}
.journal-info h3 {
  font-family: var(--serif);
  font-size: clamp(26px, 2.6vw, 34px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.4;
  margin-bottom: 22px;
}
.journal-info p { color: var(--ink-soft); font-size: 16.5px; line-height: 1.9; max-width: 540px; }
.journal-points { margin: 30px 0 38px; display: flex; flex-direction: column; gap: 14px; }
.journal-points li {
  display: flex; gap: 14px; align-items: center;
  font-size: 15.5px; font-weight: 600;
}
.journal-points li::before {
  content: "✓";
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--mint);
  color: var(--deep-2);
  display: grid; place-items: center;
  font-size: 12px;
  font-weight: 900;
  flex-shrink: 0;
}
.btn-dark { background: var(--deep); color: var(--paper); }
.btn-dark:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(14, 59, 51, 0.35); }
.journal-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

/* ---------- membership ---------- */
.member-band {
  background: var(--coral);
  border-radius: 48px;
  margin: 0 24px;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.member-band::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 40% 60% at 95% 100%, rgba(255, 255, 255, 0.18), transparent 60%);
}
.member-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 70px;
  align-items: center;
  padding: 100px 0;
}
.member-inner h2 {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1.3;
  letter-spacing: -0.02em;
}
.member-inner .lead { margin-top: 22px; font-size: 17px; line-height: 1.85; color: rgba(255, 255, 255, 0.88); max-width: 480px; }
.member-benefits { display: flex; flex-direction: column; gap: 16px; }
.benefit {
  background: rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 18px;
  padding: 22px 26px;
  display: flex;
  gap: 18px;
  align-items: center;
}
.benefit .b-ico { font-size: 26px; }
.benefit b { display: block; font-size: 16.5px; }
.benefit span { font-size: 13.5px; opacity: 0.85; }
.btn-white { background: #fff; color: var(--coral); margin-top: 36px; }
.btn-white:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(0, 0, 0, 0.18); }

/* ---------- notice ---------- */
.notice-list { border-top: 1.5px solid var(--ink); }
.notice-item {
  display: grid;
  grid-template-columns: 110px 1fr auto;
  gap: 30px;
  align-items: center;
  width: 100%;
  padding: 26px 8px;
  border-bottom: 1px solid var(--line);
  border-left: 0;
  border-right: 0;
  border-top: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background 0.2s, padding-left 0.3s;
}
.notice-item:hover, .notice-item.is-open { background: #fff; padding-left: 20px; }
.notice-item:focus-visible { outline: 2px solid var(--coral); outline-offset: -2px; }
.notice-item .cat {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--coral);
}
.notice-item .t { font-size: 16.5px; font-weight: 600; }
.notice-item .d { font-size: 13.5px; color: var(--ink-soft); font-variant-numeric: tabular-nums; }
.notice-body {
  padding: 6px 8px 28px 148px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 14.5px;
  line-height: 1.85;
}
.notice-body p { white-space: pre-line; }
.notice-image {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}

/* ---------- footer ---------- */
.footer {
  margin-top: 110px;
  background: var(--ink);
  color: var(--paper);
  padding: 90px 0 44px;
  position: relative;
  overflow: hidden;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 60px;
  padding-bottom: 60px;
  border-bottom: 1px solid var(--line-light);
}
.footer h4 {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: rgba(250, 247, 241, 0.5);
  margin-bottom: 22px;
}
.footer .f-brand .logo-text strong { font-size: 19px; }
.footer .f-brand p { margin-top: 20px; font-size: 14.5px; color: rgba(250, 247, 241, 0.65); max-width: 320px; line-height: 1.8; }
.footer li { margin-bottom: 12px; font-size: 15px; }
.footer li a { color: rgba(250, 247, 241, 0.8); transition: color 0.2s; }
.footer li a:hover { color: var(--mint); }
.footer li b { color: rgba(250, 247, 241, 0.5); font-weight: 600; font-size: 13px; display: block; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 36px;
  font-size: 13px;
  color: rgba(250, 247, 241, 0.45);
}
.footer-bottom .f-links { display: flex; gap: 24px; }
.footer-bottom a:hover { color: var(--mint); }
.footer-giant {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(60px, 9vw, 130px);
  letter-spacing: -0.03em;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(250, 247, 241, 0.14);
  white-space: nowrap;
  margin-bottom: 60px;
  user-select: none;
}

/* ---------- to-top ---------- */
.to-top {
  position: fixed;
  right: 32px; bottom: 32px;
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--deep);
  color: var(--mint);
  border: none;
  cursor: pointer;
  font-size: 18px;
  display: grid; place-items: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: 0.3s;
  z-index: 90;
  box-shadow: 0 10px 26px rgba(16, 32, 28, 0.3);
}
.to-top.show { opacity: 1; pointer-events: auto; transform: none; }
.to-top:hover { background: var(--coral); color: #fff; }

/* ---------- narrow desktop fallback ---------- */
@media (max-width: 1024px) {
  .nav { display: none; }
  .about-lead, .journal, .member-inner { grid-template-columns: 1fr; gap: 44px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat { border-right: none; border-bottom: 1px solid var(--line); }
  .acts { grid-template-columns: 1fr; }
  .lead-grid { grid-template-columns: repeat(2, 1fr); }
  .conf-item { grid-template-columns: 1fr; gap: 14px; }
  .advisor-grid { grid-template-columns: 1fr; }
  .director-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr; gap: 44px; }
  .pillars { grid-template-columns: 1fr; }
  .journal-cover { max-width: 340px; }
}